Thanks for the comments lets clear up why I chose Horri Bull over Axor.

The CJ body is very bovine like in its proportions as in it has the shorter lower (back legs) made with hooved feet. The upper arms also fit into the bull aesthetic as they are quite large and have a massive muscular look to them similar to the front legs of a bull. I figured that to use up the CJ body (of which I only needed the head) Horri Bull would be a nice counter to CJ not to mention he got his horns in Alt mode much like the G1 Horri Bull Toy.

Most of the paint apps and design choices were based upon the G1 toy box art.

I love what you've done, and echo the others' statements that he needs something to reflect the bovine-ness of his name, such as horns on his head or even horns on the hood of his vehicle mode like those on TFP Cliffjumper.